Electrolux EWM1100 User manual

SERVICE MANUAL

WASHING

ITALY S.p.A.

Spares Operations Italy

Corso Lino Zanussi, 30

Publication

number

I - 33080 PORCIA /PN (ITALY)

599 70 32-47

Fax +39 0434 394096

Edition: 2007-10-16

EN

Washing machines:

Guide to diagnostics

ENV06 of electronic

controls

EWM1100

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Contents

1.1

Purpose of this manual ....................................................................................................................... 5

1.2 Procedure ........................................................................................................................................... 5

2 CONTROL PANELS OF FRONT-LOADING APPLIANCES...................................................................... 6

3 CONTROL PANELS OF TOP-LOADING APPLIANCES........................................................................... 7

4 DIAGNOSTIC SYSTEM............................................................................................................................. 8

4.1 ACCESS TO THE DIAGNOSTIC CYCLE .......................................................................................... 8

4.2 Exiting the diagnostic system ............................................................................................................. 8

4.3 PHASES OF THE DIAGNOSTIC CYCLE .......................................................................................... 9

5 ALARMS .................................................................................................................................................. 10

5.1 Displaying the alarms to the user ..................................................................................................... 10

5.2 Reading the alarm codes.................................................................................................................. 11

5.2.1 Alarm displaying....................................................................................................................... 11

AEG Version: ........................................................................................................................................... 11

Other versions:......................................................................................................................................... 11

5.2.2 Examples of alarm display .......................................................................................................12

5.2.3 Operation of alarms during diagnostics ................................................................................... 12

5.3 Rapid reading of alarm codes........................................................................................................... 13

5.4 Cancelling the last alarm .................................................................................................................. 13

5.5 SUMMARY TABLE OF ALARMS ..................................................................................................... 14

5.6 Notes concerning certain alarm codes ............................................................................................. 16

6 THE DIAGNOSTIC PROGRAMME CANNOT BE ACCESSED .............................................................. 17

6.1.1 All LEDs on the circuit are board switched off ......................................................................... 17

6.1.2 Some of the LEDs of the circuit board light.............................................................................. 17

7 TROUBLESHOOTING ACCORDING TO ALARM CODES .................................................................... 18

E11: Difficulty in filling during wash phase ........................................................................................... 18

E13: Water leakage.............................................................................................................................. 20

E21: Difficulties in draining ................................................................................................................... 22

E23: Malfunction of the component (triac) that controls the drain pump ............................................. 24

E24: «Sensing» circuit of the component (triac) that controls the drain pump faulty........................... 25

E35: Water level too high ..................................................................................................................... 27

E38: Pressure chamber blocked .......................................................................................................... 28

E3A: Problems with “Sensing” circuit of the heating element relay ..................................................... 29

E41: Door open .................................................................................................................................... 30

E42: Problems with door aperture........................................................................................................ 32

E44: Door closure «sensing» circuit faulty ........................................................................................... 34

E45: Problems with the «sensing» circuit of the triac that actions the door interlock .......................... 34

E51: Motor power triac short-circuited ................................................................................................. 35

E52: No signal from the motor tachometric generator (first part)......................................................... 36

E52: No signal from the motor tachometric generator (second part)................................................... 38

Procedure for checking the commutator motors .................................................................................. 39

E53: Problems with the "Sensing" circuit of the triac which powers the motor .................................... 40

E54: Motor relay contacts sticking........................................................................................................ 41

E61: Insufficient heating during washing.............................................................................................. 42

E62: Overheating during washing ........................................................................................................ 43

E66: The contacts of the heating element power relay are always closed .......................................... 44

E68: Washing heating element leaks current....................................................................................... 45

E69: Washing heating element interrupted .......................................................................................... 46

E71: NTC washing sensor faulty .......................................................................................................... 47

E74: NTC sensor wrongly positioned................................................................................................... 48

E82: Error in reading the RESET/OFF position of the programme selector ........................................ 49

E83: Error in reading the programme selector code ............................................................................ 50

E93: Incorrect machine configuration................................................................................................... 51

E94: Incorrect configuration of washing cycle...................................................................................... 51

E97: Incongruence between selector version and configuration data ................................................. 51

EA1: Drum positioning system (DSP) faulty (top-loaders)................................................................... 52

EA6: Drum flap faulty (top-loaders)...................................................................................................... 53

EH1: Incorrect mains frequency ........................................................................................................... 54

EH2: Mains voltage too high ................................................................................................................ 54

EH3: Mains voltage too low.................................................................................................................. 54

EF1: Drain hose blocked/throttled/too high; drain filter dirty/blocked................................................... 55

EF2: Overdosing of detergent; drain hose blocked/throttled; drain filter dirty/blocked ........................ 55

EF5: Load too unbalanced; skipping of spin phases............................................................................ 55

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8

BASIC CIRCUIT DIAGRAM..................................................................................................................... 56

8.1.1 Key to circuit diagram............................................................................................................... 57

9 CONNECTORS ON CIRCUIT BOARD....................................................................................................58

10 BURNING ON THE CIRCUIT BOARD EWM1100............................................................................... 59

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INTRODUCTION

1.1 Purpose of this manual

The purpose of this Service Manual is to provide a simple and clear description of the

procedure to be followed by service engineers when confronted by problems identified by

the various alarm codes generated by appliances with the EWM1100 electronic control

system.

Depending on the configuration of the appliance, the alarm codes may be displayed

partially or completely to the user (the alarm codes are generally displayed partially).

The diagnostic system can be used by service engineers for the following purposes:

♦ To read the alarms

♦ To cancel alarm conditions stored in memory

♦ To test the operation of the appliance

1.2 Procedure

1. Identify the type of control system (page 6/7) and access the diagnostic cycle

(See page 8).

2. Read the alarm code stored in memory (page 11) and refer to the instructions for the

corresponding alarm code, page 14-15.

3. Cancel the alarm stored in memory (page 13).

4. If access to the diagnostic cycle is not possible, refer to the section “Access to

diagnostic system impossible” (page 17).

5. If the main PCB is replaced, check that there are no burned parts (see page 59).

6. After any repair, always check the operation of the appliance using the diagnostic cycle

(page 8).

7. Cancel any alarms stored in memory during the diagnostic procedure (page 13).

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2 CONTROL PANELS OF FRONT-LOADING APPLIANCES

TC5

ELECTROLUX

TC6

A5

AF1-A1.2

SMART ACTION

A6

AF2-A2.1

C6.2

CF1-CF2

SMART

CATALOGUE

C6.1

Z5

SMART ZANUSSI

Z6

AEG 07

SERIE5

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3 CONTROL PANELS OF TOP-LOADING APPLIANCES

TC5

ELECTROLUX

TC6

A1.2

SMART ACTION

A2.0

SMART

CATALOGUE

C1.2

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4 DIAGNOSTIC SYSTEM

4.1 ACCESS TO THE DIAGNOSTIC CYCLE

1. Switch off the appliance.

2. Press and hold down the START/PAUSE button and the nearest OPTION button

simultaneously (as represented in figure).

3. Holding down both buttons, switch the appliance on by turning the programme selector one

position clockwise.

4. Continue to hold down the buttons until the LEDs begin to flash (at least 2 seconds).

In the first position, the cycle tests the operation of the buttons and the relative LEDs. If the

selector is turned clockwise, the cycle performs the diagnostics for the various components and

reads the alarm codes.

4.2 Exiting the diagnostic system

→ To exit the diagnostic system, switch off, switch on and switch off again the appliance.

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4.3 PHASES OF THE DIAGNOSTIC CYCLE

Irrespective of the type of PCB and the configuration of the programme selector it is possible, after entering

diagnostic mode, to perform diagnostics on the operation of the various components and to read the alarms

by turning the programme selector clockwise.

All the alarms are enabled during the diagnostic cycle.

Position of

selector

Components activated Conditions of operation Function tested

1

- All the LEDs light in sequence

- When a button is pressed, the

corresponding LED lights (and

the buzzer may sound)

Always enabled

Operation of the

user interface

2

- Door safety interlock

- Washing solenoid valve

Door locked

Water level lower than anti-

overflow level

Maximum time 5 minutes

Water ducted

through washing

compartment

3

- Door safety interlock

- Pre-wash solenoid valve

Door locked

Water level lower than anti-

overflow level

Maximum time 5 minutes

Water ducted

through pre-wash

(bleach)

compartment

4

- Door safety interlock

- Washing and pre-wash solenoid

valves

Door locked

Water level lower than anti-

overflow level

Maximum time 5 minutes

Water ducted

through

conditioner

compartment

6

- Door safety interlock

- Wash solenoid (if the water in

the tub is below 1st level)

- Heating element

Door locked

Water level > 1st level

Maximum time 10 minutes

or up to 90°C (*)

Heating

7

- Door safety interlock

- Wash solenoid (if the water in

the tub is below 1st level)

- Motor (55 rpm clockwise, 55 rpm

anti-clockwise, impulse at 250

rpm)

Door locked

Water level > 1st level

Check for leaks

from the tub

8

- Door safety interlock

- Drain pump

- Motor up to 650 rpm then at

maximum spin speed (**)

Door locked

Water level lower then anti-

boiling level for spinning

Drain and spin

9

- Only for top-loaders with drum

positioning system:

- Door safety interlock

- Motor (25 rpm)

- Drain pump

Door locked

Water level lower then anti-

boiling level

Maximum time 2 minutes

Test for

positioning of

drum

(*) In most cases, this time is sufficient to check the heating. However, the time can be increased by

repeating the phase without draining the water: pass for a moment to a different phase of the diagnostic

cycle and then back to the heating control phase (if the temperature is higher than 80°C, heating does

not take place).

(**) The check at the maximum speed occurs without control of the FUCS and no clothes have to be

inserted inside the appliance.

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5 ALARMS

5.1 Displaying the alarms to the user

The alarms displayed to the user are listed below:

ª Door open

ª Drain difficulty (dirty filter)

ª Water fill difficulty (closet tap)

AEG Version

The alarms are represented through the flashing of the yellow LED, which is above

the START-PAUSE button, and can be solved directly by the end user.

Other versions

The alarms are represented through the flashing of the red LED, which is inside

the START-PAUSE button, and can be solved directly by the user.

The alarms listed below, instead:

ª Water leakage (Aqua Control System)

ª Low electric voltage

ª Irregular frequency of the electric network

are displayed to the user, but for their solution it is necessary the intervention of the Service.

The alarms are enabled during the execution of the washing programme, with the exception of alarms

associated with configuration and the power supply (voltage/frequency), which are also displayed during the

programme selection phase.

The door can normally be opened (except where specified) when an alarm condition has occurred on

condition that:

• The level of the water in the tub is below a certain level

• Water temperature lower than 55°C

• Motor stopped

Certain alarm conditions require that a drain phase be performed before the door can be opened for safety

reasons:

• Cooling water fill if the temperature is higher than 65°C

• Drain until the analogue pressure switch is on empty, during a max. 3-minute time.

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5.2 Reading the alarm codes

It is possible to display the last three memorised alarms in the FLASH memory

of the electronic board:

• Enter diagnostic mode (par. 4.1).

• Irrespective of the type of PCB and configuration, turn the programme

selector clockwise to the tenth position.

• The last alarm is displayed.

• To display the previous alarms, press sequentially the left button of the

START/PAUSE button (as represented in figure).

• To return to the last alarm, press the START/PAUSE button.

5.2.1 Alarm displaying

AEG Version:

The alarm is displayed by a repeated flashing sequence of the START / PAUSE

button with yellow and red light (0,5 seconds on, 0,5 seconds off with a 2,5

second pause between the sequences).

• button indicator START / PAUSE with yellow light → indicates the first digit of

the alarm code (family)

• button indicator START / PAUSE with red light → indicates the second digit

of the alarm code (internal number of the family)

These two LEDs are featured in all models.

Other versions:

The alarm is displayed by a repeated flashing sequence of the START / PAUSE

button with red and green light (0,5 seconds on, 0,5 seconds off with a 2,5

second pause between the sequences).

• LED indicator START / PAUSE with red light → indicates the first digit of the

alarm code (family)

• LED indicator START / PAUSE with green light → indicates the second digit

of the alarm code (internal number of the family)

These two LEDs are featured in all models.

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Notes:

• The first letter of the alarm code “E” (Error) is not displayed, since this letter is common to all alarm

codes.

• The alarm code “families” are shown in hexadecimal; in other words:

→ A is represented by 10 flashes

→ B is represented by 11 flashes

→ ...

→ F is represented by 15 flashes

• Configuration errors are shown by the flashing of all the LEDs (user interface not configured).

5.2.2 Examples of alarm display

Example: Alarm E43 (problems with the door interlock Triac) will display the following:

• the sequence of four flashes of the START / PAUSE button with red light, indicates the first number

E

43;

• the sequence of three flashes of the START / PAUSE button with green light, indicates the second

number E4

3;

5.2.3 Operation of alarms during diagnostics

All alarms are enabled during the components diagnostic phase.

START / PAUSE button with red light START / PAUSE button with green light

ON/OFF

On/Off

(Ver. AEG)

Time

(Sec.)

Value ON/OFF

On/Off

(Ver. AEG)

Time

(Sec.)

Value

0.5

1

0.5

1

0.5

2

0.5

2

0.5

3

0.5

3

0.5

4

1.5 Pause

2.5 Pause

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5.3 Rapid reading of alarm codes

The last three alarm codes can be displayed even if the programme selector is not in the tenth position

(diagnostics) or if the appliance is in normal operating mode (e.g. during the execution of the washing

programme):

→ Press and hold down START/PAUSE and the nearest option button (as to enter the

DIAGNOSTICS), for at least two seconds: the LEDs initially switch off, and then display the flashing

sequence indicating the last alarm.

→ To display the previous alarms press the left button of the START/PAUSE button sequentially.

→ To return to the last alarm, press the START/PAUSE button.

→ The alarm sequence continues as long as the two buttons are held down.

→ The alarm reading system is as described in paragraph 5.2.1.

→ While the alarms are displayed, the appliance continues to perform the cycle or, if in the programme

selection phase, maintains the previously-selected options in memory.

5.4 Cancelling the last alarm

It is good practice to cancel the last alarm:

• after reading the alarm code, to check whether the alarm re-occurs during diagnostics;

• after repairing the appliance, to check whether it re-occurs during testing.

1. Select diagnostic mode and turn the programme selector to the tenth position (reading of alarms).

2. Press and hold down START/PAUSE and the nearest option button (as represented in figure).

3. Hold down the buttons till the LEDs stop to flash (at least 5 seconds).

N.B. With this operation all the memorised alarms are deleted.

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5.5 SUMMARY TABLE OF ALARMS

Alarm Possible fault Action/machine status

Reset Page

E11

Tap closed or water pressure too low; Drain tube improperly positioned; Water fill

solenoid valve is faulty; Leaks from water circuit on pressure switch; Pressure switch

faulty; Wiring faulty; PCB faulty.

Cycle is paused with door locked.

START/RESET

18

E13

Drain tube improperly positioned; Water pressure too low;

Water fill solenoid valve is faulty; Water circuit on pressure switch is leaking/clogged;

Pressure switch faulty.

Cycle is paused with door locked.

START/RESET

20

E21

Drain tube kinked/clogged/improperly positioned; Drain filter clogged/dirty; Drain

pump faulty; Pressure switch faulty; Wiring faulty; PCB faulty; Electrical current leak

between heating element and ground.

Cycle is paused (after 2 attempts).

START/RESET

22

E23

Drain pump faulty; Wiring faulty; PCB faulty.

Safety drain cycle - Cycle stops with

door unlocked.

RESET

24

E24

PCB faulty.

Safety drain cycle - Cycle stops with

door unlocked.

RESET

25

E31

Pressure switch; Wiring; Main PCB. Cycle stops with door locked.

RESET

25

E32

Drain tube kinked/clogged/improperly positioned; Drain filter clogged/dirty; Drain

pump faulty;

Water circuit on pressure switch; pressure switch;

Wiring; main board.

Cycle is paused.

START/RESET

26

E35

Water fill solenoid valve is faulty; Leaks from water circuit on pressure switch;

Pressure switch faulty; Wiring faulty; PCB faulty.

Cycle stops. Safety drain cycle.

Drain pump continues to operate (5

min. on, then 5 min. off, etc.).

RESET

27

E38

Water circuit on pressure switches; Pressure switches; Motor belt broken. Heating phase is skipped.

RESET

28

E3A

PCB faulty. Cycle stops with door locked.

RESET

29

E41

Door lock unit faulty; Wiring faulty; PCB faulty. Cycle is paused.

START/RESET

30

E42

Door lock unit faulty; Wiring faulty; PCB faulty. Current leakage from heating element

to ground.

Cycle is paused.

START/RESET

32

E43

Door lock unit faulty; Wiring faulty;

PCB faulty.

(Safety drain cycle) Cycle stops.

ON/OFF RESET

33

E44

PCB faulty. (Safety drain cycle) Cycle stops.

ON/OFF RESET

34

E45

PCB faulty. (Safety drain cycle) Cycle stops.

ON/OFF RESET

34

E51

PCB faulty; current leakage from motor or from wiring.

Cycle blocked, door locked (after 5

attempts).

RESET

35

E52

Motor faulty; wiring faulty; PCB faulty.

Cycle blocked, door locked (after 5

attempts).

RESET

36

E53

PCB faulty. Cycle blocked, door locked.

RESET

40

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Alarm Possible fault Action/machine status

Reset Page

E54

PCB faulty; current leakage from motor or from wiring.

Cycle blocked, door locked (after 5

attempts).

RESET

41

E61

NTC sensor faulty; heating element faulty; wiring faulty; PCB faulty. The heating phase is skipped.

START/RESET

42

E62

NTC sensor faulty; heating element faulty; wiring faulty; PCB faulty.

Safety drain cycle – Cycle stopped

with door open.

RESET

43

E66

PCB faulty.

Safety drain cycle – Cycle stopped

with door open.

RESET

44

E68

Earth-leakage between heater and earth. Cycle blocked with door open.

RESET

45

E69

Washing heating element interrupted (thermofuse open) ----------------

START/RESET

46

E71

Faulty NTC sensor; Wiring faulty;

PCB faulty.

Heating is skipped.

START/RESET

47

E74

NTC sensor improperly positioned; Faulty NTC sensor; Wiring faulty; PCB faulty. Heating is skipped.

START/RESET

48

E82

PCB faulty (Wrong configuration data). Selector, wiring ----------------

RESET

49

E83

PCB faulty (Wrong configuration data). Selector, wiring Cycle cancelled.

START/RESET

50

E93

Incorrect configuration data; PCB faulty. Cycle interrupted.

OFF/ON

51

E94

Incorrect configuration data; PCB faulty. Cycle interrupted.

OFF/ON

51

E97

Faulty PCB (Wrong configuration data). Cycle interrupted.

RESET

51

EA1

Wiring faulty; Circuit board faulty; DSP sensor faulty; Motor drive belt broken. Drum positioning phase skipped. ON/OFF RESET

52

EA6

Basket cover open. Motor faulty; Wiring faulty; PCB faulty. Cycle interrupted.

ON/OFF RESET

53

EH1

Power supply problems (incorrect / disturbance); PCB faulty.

Wait for frequency nominal

conditions.

OFF/ON

54

EH2

Power supply problems (incorrect / disturbance); PCB faulty. Wait for voltage nominal conditions.

OFF/ON

54

EH3

Power supply problems (incorrect / disturbance); PCB faulty. Wait for voltage nominal conditions.

OFF/ON

54

EF1

Drain tube blocked/kinked/too high;

Drain filter dirty/blocked.

Warning displayed at the end of cycle

(specific LED).

START/RESET

55

EF2

Excessive detergent dosing; drain tube kinked/blocked;

Drain filter dirty/blocked.

Warning displayed after 5 attempts or

by the specific LED.

RESET

55

EF3

Water leaks onto base frame; water control system defective. Machine drains and cycle stops

RESET

55

EF5

Load too unbalanced; final spin phases skipped.

---------------- START/RESET

55

E00

---------------- ---------------- ----------------

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5.6 Notes concerning certain alarm codes

 Configuration alarms E93: If these alarms are generated (when the appliance is switched on), operation of the appliance is blocked and all the LEDs light.

The diagnostic procedure cannot be accessed; the only option is to switch the appliance OFF (by turning the selector to position “0”).

 Configuration alarm E94: For this alarm code, only the family for alarm “9” is displayed; the diagnostic procedure cannot be accessed, and the “rapid alarm

display” function cannot be used.

 Alarms EH1-EH2-EH3: In the event of problems with the mains power supply, the appliance remains in alarm mode until the mains frequency or voltage are

restored to the correct value or the appliance is switched off (by turning the programme selector to “0”). The family of alarm “B” is displayed; the diagnostic

procedure cannot be accessed, and the “rapid alarm display” function cannot be used. The complete alarm code can be read only when the abnormal

situation has ceased.

 Alarms E51- E52: During the diagnostic test, all the alarms are displayed. Normally, when the programme selector is turned from one test phase to another,

the appliance exits the alarm condition and performs the phase selected. This does not take place in the case of alarms E51 (power triac on motor short-

circuited) and E52 (no signal from the tachometric generator on the motor): in these cases, the only option to exit the alarm condition is to switch the appliance

OFF by turning the selector to position “0” (reset).

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6 THE DIAGNOSTIC PROGRAMME CANNOT BE ACCESSED

6.1.1 All LEDs on the circuit are board switched off

Are the power cable and connection OK?

No →

Replace or repair the power cable, check the

connector

Yes ↓

Does the suppressor function correctly?

No →

Replace the suppressor

Yes ↓

Is the wiring from the suppressor to the circuit

board (connectors U3.1-U3.2) OK?

No →

Replace or repair the wiring

Yes ↓

Does the programme selector function

correctly?

No →

Replace or repair the knob or knob spindle

Yes ↓

Replace the circuit board and perform the

diagnostic programme.

6.1.2

Some of the LEDs of the circuit board light

Do the keys move without hindrance in the

housings in the control panel and correctly

action the corresponding buttons?

No →

Solve the mechanical problems

(control panel / keys / spindles)

Yes ↓

Replace the circuit board and perform the

diagnostic programme

If there are traces of burning on the circuit

board, refer to page 59

U3-1

U3-2

Circuit board

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YES

Access the diagnostic cycle and duct water through all the compartments (phases 2,3,4)

Is water ducted through all the compartments?

7 TROUBLESHOOTING ACCORDING TO ALARM CODES

E11: Difficulty in filling during wash phase

E11

Maximum water fill time for each pressure switch level

(this time is reset to zero each time the level is reached)

E11

Tests to be performed:

YES

NO

YES

Position the drain circuit correctly and restart the

diagnostic cycle to check for further alarm

conditions.

NO

Repair the hydraulic circuit of the pressure

switch and restart the diagnostic cycle to check

for further alarm conditions.

Replace the circuit board and restart the diagnostic cycle to check for further alarms.

Is the drain hose positioned

correctly so as not to create the

siphon effect? (fig.1)

Is the hydraulic circuit of the

pressure switch efficient

(leaks/blockage)? Fig. 2

NO

Check that the tap is open, that the mains

water pressure is sufficient and that the hoses

are correctly connected and not kinked.

Do any or all the solenoids fail to function?

NO

Replace the solenoid and restart the diagnostic

cycle to check for further alarm conditions.

Is the ohmic resistance of the solenoid about 3.5

– 4.5 KΩ? (measure directly on the solenoid

without wiring) -see fig. 3-

NO

YES

NO

Replace or repair the wiring and restart the

diagnostic cycle to check for further alarm

conditions.

Re-attach the connector and measure about 3.5

–4.5 KΩ on the solenoid wiring connector

(circuit board side (fig.4): across J9-3 and J9-1

(washing), across J9.4 and J9.6 (prewash).

Is the solenoid wiring OK?

YES

Replace the circuit board and restart the

diagnostic cycle to check for further alarm

conditions.

NO

Repair the hydraulic circuit and restart the

diagnostic cycle to check for further alarm

conditions.

Is the hydraulic circuit efficient

(leaks)?

If there are traces of burning on the circuit

board, refer to page 59

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E11

Fig. 1

J9

J10

J7

J2

J1

U3

Fig.4

3500÷4000 Ω

Circuit board

Fig.3

Fig.2

J9

J10

J7

J2

J1

U3

Fig.4

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YES

Access the diagnostic cycle and duct water through all the compartment (phases 2,3,4)

Is water ducted through all the compartments?

E13: Water leakage

E13

Overall maximum water fill time exceeded (the sum of all the water fills between one drain

phase and the next, to avoid exceeding the maximum volume)

E13

Tests to be performed:

YES

NO

YES

Position the drain circuit correctly and restart the

diagnostic cycle to check for further alarm

conditions.

NO

Repair the hydraulic circuit of the pressure

switch and restart the diagnostic cycle to check

for further alarm conditions.

Replace the circuit board and restart the diagnostic cycle to check for further alarms.

Is the drain hose positioned

correctly so as not to create the

siphon effect? (fig.1)

Is the hydraulic circuit of the

pressure switch efficient

(leaks/blockage)? fig.2

NO

Check that the tap is open, that the mains

water pressure is sufficient and that the hoses

are correctly connected and not kinked.

Do any or all the solenoids fail to function?

YES

NO

Replace the solenoid and restart the diagnostic

cycle to check for further alarm conditions.

Is the ohmic resistance of the solenoid about 3.5

– 4.5 KΩ? (measure directly on the solenoid

without wiring) -see fig. 3-

NO

YES

NO

Replace or repair the wiring and restart the

diagnostic cycle to check for further alarm

conditions.

Re-attach the connector and measure about 3.5

–4.5 KΩ on the solenoid wiring connector

(circuit board side) see fig. 4-: across J9-3 and

J9-1 (washing) and across J9-6 and J9-4

(prewash). Is the solenoid wiring OK?

YES

Replace the circuit board and restart the

diagnostic cycle to check for further alarm

conditions.

NO

Repair the hydraulic circuit and restart the

diagnostic cycle to check for further alarms.

Is the hydraulic circuit efficient

(leaks)?

If there are traces of burning on the circuit

board, refer to page 59

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Electrolux EWM1100 User manual

Electrolux EWM1100 User manual

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